Showing 1-30 of 1768 results for "

33015

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Rosa Perestrelo et al.
Journal of chromatography. A, 1381, 54-63 (2015-01-27)
An improved, reliable and powerful analytical strategy based on digitally controlled microextraction by packed sorbent (MEPS) combined with ultrahigh pressure liquid chromatography (UHPLC) was validated for the simultaneous identification and quantification of major furanic derivatives, namely 5-hydroxymethyl-2-furaldehyde (5HMF), 5-methyl-2-furaldehyde (5MF)...
Antonios Ampatzoglou et al.
The Journal of nutrition, 145(2), 215-221 (2015-02-04)
Whole-grain (WG) foods have been suggested to reduce the risk of cardiovascular disease, but studies are inconsistent and effects on cardiovascular risk markers are not clear. The objective of this study was to assess the impact of increasing WG consumption...
Kristina Haslinger et al.
Chembiochem : a European journal of chemical biology, 15(18), 2719-2728 (2014-11-02)
Bacterial cytochrome P450s form a remarkable clade of the P450 superfamily of oxidative hemoproteins, and are often involved in the biosynthesis of complex natural products. Those in a subgroup known as "Oxy enzymes" play a crucial role in the biosynthesis...
Xianyin Lai et al.
Cancer genomics & proteomics, 12(6), 271-281 (2015-11-07)
Follicular adenoma is a type of benign and encapsulated nodule in the thyroid gland, but some adenomas have the potential to progress to follicular carcinoma. Therefore, it is important to monitor the state and progress of follicular adenoma in the...
YuXia Zhou et al.
Journal of separation science, 37(11), 1248-1255 (2014-03-13)
The characterization of process-related impurities and forced degradants of alogliptin benzoate (Alb) in bulk drugs and a stability-indicating HPLC method for the separation and quantification of all the impurities were investigated. Alb was found to be unstable under acid and...
Shuang-Qing Zhang
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 978-979, 24-28 (2014-12-23)
Icaritin (ICT), a bioactive metabolite of prenylflavonoids from genus Epimedium, has displayed potential benefits for the treatment of osteoporosis, prostate cancer, liver cancer, renal cancer and breast cancer. To investigate the quantity of ICT in bones in vivo, a simple...
Jingjing Liu et al.
Chemical research in toxicology, 28(3), 394-400 (2014-10-18)
Carcinogenic formaldehyde is produced by endogenous protein oxidation and various exogenous sources. With formaldehyde being both ubiquitous in the ambient environment and one of the most common reactive carbonyls produced from endogenous metabolism, quantifying formaldehyde exposure is an essential step...
Harry Moultrie et al.
The Journal of antimicrobial chemotherapy, 70(2), 543-549 (2014-10-05)
Co-treatment of HIV and TB in young children is complicated by limited treatment options and complex drug-drug interactions. Rifabutin is an alternative to rifampicin for adults receiving a ritonavir-boosted PI. We aimed to evaluate the short-term safety and pharmacokinetics of...
Stephen W C Chung et al.
Journal of agricultural and food chemistry, 62(25), 5805-5811 (2014-06-06)
This paper reports the development of a method for the quantitative analysis of perfluorinated compounds (PFCs), including C6-C14 perfluorinated carboxylic acids (PFCAs) and C4-C12 perfluorinated sulfonates (PFSAs), in fish and fatty foods by ultraperformance liquid chromatography-electrospray ionization-tandem mass spectrometry (UPLC-ESI-MS/MS)...
I Iovinella et al.
Journal of proteomics, 128, 272-279 (2015-08-15)
We applied a "shotgun" approach based on nanoliquid chromatography-high resolution mass spectrometry associated to label free quantification (LFQ) to identify proteins varying with age, independently from the physiological state, in Aedes albopictus, a mosquito species which in the last decades...
Hua Yang et al.
International journal of pharmaceutics, 477(1-2), 88-95 (2014-12-03)
The purpose of this work was to explore the feasibility of using Soluplus(®) in preparing a fenofibrate (FBT) nanosuspension adopting wet media milling technology. HPMC and Soluplus(®) were used as stabilizers to prepare FBT/HPMC nanosuspension (F1) and FBT/Soluplus(®) nanosuspension (F2)...
Emilie Destandau et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 985, 29-37 (2015-02-04)
An innovative procedure coupling pressurized solvent extraction and centrifugal partition chromatography (CPC) used in linear gradient elution mode was developed to isolate two pure germacranolides (9α-hydroxyparthenolide and 9β-hydroxyparthenolide) and to separate flavonoids (nepetin, isorhamnetin and jaceosidin) and chlorophyll pigments from...
Mack Moyo et al.
Plant science : an international journal of experimental plant biology, 227, 157-164 (2014-09-16)
Micropropagation of Hypoxis hemerocallidea Fisch. and C.A. Mey was used as a model system to study the influence of cytokinins (CKs) on plant regeneration and biochemical accumulation of hydroxybenzoic and hydroxycinnamic acid derivatives in organ and callus cultures and their...
Srinivasan Shanmugam et al.
Drug development and industrial pharmacy, 40(6), 803-812 (2013-06-21)
The main objective was to investigate the in vitro release profile/kinetics, and in vivo plasma pharmacokinetics (PK) and organ biodistribution (BD) of the prepared sildenafil vaginal suppositories (SVS). Suppositories containing 25 mg of sildenafil were prepared by the cream melting technique...
Nassima Chaher et al.
Journal of pharmaceutical and biomedical analysis, 117, 79-84 (2015-09-08)
Three unusual dioxatricyclodecenone compounds, mollugoside A, E-mollugoside B and Z-mollugoside B and, together with known flavonoids, were isolated from the aerial parts of Galium mollugo collected in north-eastern Algeria. Their structures were elucidated by analysis of spectroscopic data, including 1D...
Xiang-yang Wang et al.
Journal of chromatographic science, 52(8), 814-817 (2013-08-13)
A simple, accurate and reliable method for the simultaneous separation and determination of six active components (protocatechuic acid, chlorogenic acid, caffeic acid, paeoniflorin, ferulic acid and rosmarinic acid) in traditional Chinese medicinal preparation Cerebralcare Granule(®) (CG) was developed using reverse-phase...
Mamdouh R Rezk et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 978-979, 103-110 (2014-12-23)
A rapid, simple, sensitive and specific LC-MS/MS method was developed and validated for the simultaneous quantification of four antimicrobials commonly used in aquaculture, namely ciprofloxacin (CPX), trimethoprim (TMP), sulphadimethoxine (SDM) and florphenicol (FLOR) in fish tissues. The LC-MS/MS was operated...
Brandon T Gufford et al.
Drug metabolism and disposition: the biological fate of chemicals, 42(10), 1675-1683 (2014-07-11)
Drug-metabolizing enzymes within enterocytes constitute a key barrier to xenobiotic entry into the systemic circulation. Furanocoumarins in grapefruit juice are cornerstone examples of diet-derived xenobiotics that perpetrate interactions with drugs via mechanism-based inhibition of intestinal CYP3A4. Relative to intestinal CYP3A4-mediated...
Rick W Fedeniuk et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 983-984, 1-9 (2015-01-24)
Separate methods for the quantitation and confirmation of regulatory relevant residue concentrations of total florfenicol and tulathromycin residues in multiple tissue matrices were developed and validated. Total florfenicol residues, determined and expressed as florfenicol amine (FFA) equivalents, were quantified and...
Zhenzhen Wang et al.
Analytical chemistry, 86(21), 10600-10607 (2014-10-10)
Engineering of specialized metabolites in plants, microbes, and other organisms is hindered by significant knowledge gaps about metabolic pathways responsible for metabolite accumulation and degradation. While isotopic tracers have provided important information about metabolic fluxes in central metabolism, limitations of...
Dany Spaggiari et al.
Journal of chromatography. A, 1371, 244-256 (2014-12-03)
The goal of this study was to evaluate the combination of powerful chromatographic methods and compact single quadrupole MS device for simple in vitro cytochrome P450 (CYP) inhibition assay, instead of more expensive triple quadrupole MS/MS detectors. For this purpose...
Wei-Nan Wang et al.
Molecules (Basel, Switzerland), 20(10), 19291-19309 (2015-10-30)
Compound K (CK), a highly active and bioavailable derivative obtained from protopanaxadiol ginsenosides, displays a wide variety of pharmacological properties, especially antitumor activity. However, the inadequacy of natural sources limits its application in the pharmaceutical industry. In this study, we...
Guangrui Lai et al.
Prenatal diagnosis, 34(12), 1146-1152 (2014-07-02)
Trisomy 21 and trisomy 18 are the two most common chromosomal anomalies in live births. To find new biomarkers for aneuploidies and pathogenesis of fetal malformations, we measured insulin-like growth factor (IGF) axis-related proteins in amniotic fluid (AF) of pregnant...
Christian Galicia et al.
Molecular immunology, 65(2), 250-258 (2015-02-24)
Latex allergy is a health problem that mainly affects medical environments, causing anaphylactic shocks in extreme cases. Sensitization and reactions to this material is closely linked to the use of latex gloves. The objective of this study was to purify...
Forouzan Aboufazeli et al.
Journal of the American Society for Mass Spectrometry, 26(4), 587-595 (2015-01-15)
Fragmentation of glycopeptides in tandem mass spectrometry (MS/MS) plays a pivotal role in site-specific protein glycosylation profiling by allowing specific oligosaccharide compositions and connectivities to be associated with specific loci on the corresponding protein. Although MS/MS analysis of glycopeptides has...
Kwi Young Kang et al.
The Journal of rheumatology, 42(11), 2003-2011 (2015-09-04)
Synovial fluid (SF) is one of the most important materials that reflect the pathophysiological process of arthritis. A metabolomic and lipidomic study of SF was performed with the aim of identifying tentative diagnostic markers or therapeutic candidates for rheumatoid arthritis...
P A Léon Bouyou et al.
Analytical and bioanalytical chemistry, 406(20), 5019-5030 (2014-06-11)
Trace levels of the veterinary antibiotic compound sulfadiazine (SDZ) can be determined in agricultural drainage water samples with this new method. Optimized sample pretreatment and solid-phase extraction was combined with liquid chromatography coupled to tandem mass spectrometry (SPE LC-MS/MS) using...
Michael Reinwarth et al.
PloS one, 9(10), e108626-e108626 (2014-10-11)
Over the last decades the field of pharmaceutically relevant peptides has enormously expanded. Among them, several peptide families exist that contain three or more disulfide bonds. In this context, elucidation of the disulfide patterns is extremely important as these motifs...
Xiaomei Teng et al.
Journal of separation science, 38(1), 50-59 (2014-10-29)
A novel method for the screening of 151 drugs of abuse and toxic compounds in human whole blood has been developed and validated by online solid-phase extraction with liquid chromatography coupled to time-of-flight mass spectrometry. Analytes were extracted and separated...
Nicole Schöbel et al.
Chemical senses, 39(6), 471-487 (2014-04-11)
Astringency is an everyday sensory experience best described as a dry mouthfeel typically elicited by phenol-rich alimentary products like tea and wine. The neural correlates and cellular mechanisms of astringency perception are still not well understood. We explored taste and...